Sound like a problem of refresh…
Maybe you have to read the documentation about your device to see if he refresh the temperature at each wake up.
You can try something : Click 3 times on the inclusion button and see if the values are refreshed when the device wake up.
If yes, there is a block in blockly to refresh a zwave device. You can create a scene that will run every X minutes (where x is the refresh interval of your device)